The instructions said that our year Tacoma needed to retain the crankcase ventilation, so a 1 3/8-inch hole needed to be drilled in the intake tube. Matt used a Rotozip, but a holesaw would have been just as easy. Then the intake was mounted to the throttle-body and the crankcase vent was pressed on.
2004 Toyota Tacoma Prerunner - Prerunner Panic - Tech